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Labied S, Wenders F, Gaspard O, Ravet S, Desmecht A, Nisolle M, Henry L. Birth of Thirty-Two Healthy Babies Following Transfer of Fresh and Frozen-Thawed Embryos Derived from Monopronuclear Zygotes: A Retrospective Study. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:1361. [PMID: 39202642 PMCID: PMC11355993 DOI: 10.3390/medicina60081361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 08/13/2024] [Accepted: 08/14/2024] [Indexed: 09/03/2024]
Abstract
Background and Objectives: Fertilized zygotes normally display two pronuclei (PN), but abnormal fertilization patterns (0, 1 or >2PN) are observed daily in IVF labs. Multiple PN zygotes (>2) are generally discarded due to an increased risk of aneuploidy. However, the decision to transfer or not transfer 1PN-derived embryos remains controversial. The aims of our study were to analyze the neonatal outcomes of fresh or frozen-thawed embryos derived from 1PN zygotes, and to evaluate the influence of the fertilization method. Materials and Methods: Data were retrospectively collected from cycles performed between January 2018 and December 2022. Fresh cycles were analyzed for the comparative fate of 1PN zygotes (n = 1234) following conventional in vitro fertilization (cIVF; n = 648) or intracytoplasmic sperm injection (ICSI; n = 586), as well as the results of the 64 transfers of 1PN-derived embryos (pregnancy rate (PR) and neonatal outcomes). This pregnancy follow-up was also applied to 167 transfers of frozen-thawed 1PN-derived embryos. Results: In fresh cycles, 46% of the 1PN zygotes in the cIVF group developed into embryos of sufficient quality to be transferred or frozen (day 3 or 5/6). This rate was lower in the fresh ICSI cycles (33%). Blastulation rate was also significantly higher in the cIVF group (44%) in comparison to the ICSI group (20%). The fresh single embryo transfers (32 per group) allowed seven pregnancies in the cIVF group (PR = 21.9%) as compared to four pregnancies in the ICSI group (PR = 12.5%). In the cIVF group, five deliveries of healthy newborns were achieved, but only one in the ICSI group. In frozen/thawed cycles, 36 pregnancies were obtained out of the 167 transfers. A non-significant difference was observed between embryos derived from cIVF cycles (PR = 26%) and ICSI cycles (PR = 16%) with 18 and 8 healthy babies born, respectively. Conclusions: We observed better outcomes for 1PN zygotes in cIVF cycles in comparison to ICSI cycles. Our center policy to transfer good-quality 1PN-derived embryos allowed the birth of 32 healthy babies.
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Affiliation(s)
- Soraya Labied
- Center for Reproductive Medicine, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium; (F.W.); (O.G.); (S.R.)
| | - Frédéric Wenders
- Center for Reproductive Medicine, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium; (F.W.); (O.G.); (S.R.)
| | - Olivier Gaspard
- Center for Reproductive Medicine, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium; (F.W.); (O.G.); (S.R.)
| | - Stéphanie Ravet
- Center for Reproductive Medicine, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium; (F.W.); (O.G.); (S.R.)
| | - Alice Desmecht
- Faculty of Medicine, University of Liège, Place du Vingt Août 7, 4000 Liege, Belgium;
| | - Michelle Nisolle
- Obstetrics and Gynecology Department, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium;
| | - Laurie Henry
- Center for Reproductive Medicine, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium; (F.W.); (O.G.); (S.R.)
- Obstetrics and Gynecology Department, University of Liège, Boulevard du 12ème de Ligne 1, 4000 Liege, Belgium;
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Cimadomo D, Rienzi L, Conforti A, Forman E, Canosa S, Innocenti F, Poli M, Hynes J, Gemmell L, Vaiarelli A, Alviggi C, Ubaldi FM, Capalbo A. Opening the black box: why do euploid blastocysts fail to implant? A systematic review and meta-analysis. Hum Reprod Update 2023; 29:570-633. [PMID: 37192834 DOI: 10.1093/humupd/dmad010] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 03/22/2023] [Indexed: 05/18/2023] Open
Abstract
BACKGROUND A normal chromosomal constitution defined through PGT-A assessing all chromosomes on trophectoderm (TE) biopsies represents the strongest predictor of embryo implantation. Yet, its positive predictive value is not higher than 50-60%. This gap of knowledge on the causes of euploid blastocysts' reproductive failure is known as 'the black box of implantation'. OBJECTIVE AND RATIONALE Several embryonic, maternal, paternal, clinical, and IVF laboratory features were scrutinized for their putative association with reproductive success or implantation failure of euploid blastocysts. SEARCH METHODS A systematic bibliographical search was conducted without temporal limits up to August 2021. The keywords were '(blastocyst OR day5 embryo OR day6 embryo OR day7 embryo) AND (euploid OR chromosomally normal OR preimplantation genetic testing) AND (implantation OR implantation failure OR miscarriage OR abortion OR live birth OR biochemical pregnancy OR recurrent implantation failure)'. Overall, 1608 items were identified and screened. We included all prospective or retrospective clinical studies and randomized-controlled-trials (RCTs) that assessed any feature associated with live-birth rates (LBR) and/or miscarriage rates (MR) among non-mosaic euploid blastocyst transfer after TE biopsy and PGT-A. In total, 41 reviews and 372 papers were selected, clustered according to a common focus, and thoroughly reviewed. The PRISMA guideline was followed, the PICO model was adopted, and ROBINS-I and ROB 2.0 scoring were used to assess putative bias. Bias across studies regarding the LBR was also assessed using visual inspection of funnel plots and the trim and fill method. Categorical data were combined with a pooled-OR. The random-effect model was used to conduct the meta-analysis. Between-study heterogeneity was addressed using I2. Whenever not suitable for the meta-analysis, the included studies were simply described for their results. The study protocol was registered at http://www.crd.york.ac.uk/PROSPERO/ (registration number CRD42021275329). OUTCOMES We included 372 original papers (335 retrospective studies, 30 prospective studies and 7 RCTs) and 41 reviews. However, most of the studies were retrospective, or characterized by small sample sizes, thus prone to bias, which reduces the quality of the evidence to low or very low. Reduced inner cell mass (7 studies, OR: 0.37, 95% CI: 0.27-0.52, I2 = 53%), or TE quality (9 studies, OR: 0.53, 95% CI: 0.43-0.67, I2 = 70%), overall blastocyst quality worse than Gardner's BB-grade (8 studies, OR: 0.40, 95% CI: 0.24-0.67, I2 = 83%), developmental delay (18 studies, OR: 0.56, 95% CI: 0.49-0.63, I2 = 47%), and (by qualitative analysis) some morphodynamic abnormalities pinpointed through time-lapse microscopy (abnormal cleavage patterns, spontaneous blastocyst collapse, longer time of morula formation I, time of blastulation (tB), and duration of blastulation) were all associated with poorer reproductive outcomes. Slightly lower LBR, even in the context of PGT-A, was reported among women ≥38 years (7 studies, OR: 0.87, 95% CI: 0.75-1.00, I2 = 31%), while obesity was associated with both lower LBR (2 studies, OR: 0.66, 95% CI: 0.55-0.79, I2 = 0%) and higher MR (2 studies, OR: 1.8, 95% CI: 1.08-2.99, I2 = 52%). The experience of previous repeated implantation failures (RIF) was also associated with lower LBR (3 studies, OR: 0.72, 95% CI: 0.55-0.93, I2 = 0%). By qualitative analysis, among hormonal assessments, only abnormal progesterone levels prior to transfer were associated with LBR and MR after PGT-A. Among the clinical protocols used, vitrified-warmed embryo transfer was more effective than fresh transfer (2 studies, OR: 1.56, 95% CI: 1.05-2.33, I2 = 23%) after PGT-A. Lastly, multiple vitrification-warming cycles (2 studies, OR: 0.41, 95% CI: 0.22-0.77, I2 = 50%) or (by qualitative analysis) a high number of cells biopsied may slightly reduce the LBR, while simultaneous zona-pellucida opening and TE biopsy allowed better results than the Day 3 hatching-based protocol (3 studies, OR: 1.41, 95% CI: 1.18-1.69, I2 = 0%). WIDER IMPLICATIONS Embryo selection aims at shortening the time-to-pregnancy, while minimizing the reproductive risks. Knowing which features are associated with the reproductive competence of euploid blastocysts is therefore critical to define, implement, and validate safer and more efficient clinical workflows. Future research should be directed towards: (i) systematic investigations of the mechanisms involved in reproductive aging beyond de novo chromosomal abnormalities, and how lifestyle and nutrition may accelerate or exacerbate their consequences; (ii) improved evaluation of the uterine and blastocyst-endometrial dialogue, both of which represent black boxes themselves; (iii) standardization/automation of embryo assessment and IVF protocols; (iv) additional invasive or preferably non-invasive tools for embryo selection. Only by filling these gaps we may finally crack the riddle behind 'the black box of implantation'.
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Affiliation(s)
- Danilo Cimadomo
- IVIRMA Global Research Alliance, GENERA, Clinica Valle Giulia, Rome, Italy
| | - Laura Rienzi
- IVIRMA Global Research Alliance, GENERA, Clinica Valle Giulia, Rome, Italy
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Alessandro Conforti
- Department of Neuroscience, Reproductive Science and Odontostomatology, Federico II University, Naples, Italy
| | - Eric Forman
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Columbia University Irving Medical Centre, New York, NY, USA
| | | | - Federica Innocenti
- IVIRMA Global Research Alliance, GENERA, Clinica Valle Giulia, Rome, Italy
| | - Maurizio Poli
- Centrum voor Kinderwens, Dijklander Hospital, Purmerend, The Netherlands
- Juno Genetics, Rome, Italy
| | - Jenna Hynes
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Columbia University Irving Medical Centre, New York, NY, USA
| | - Laura Gemmell
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Columbia University Irving Medical Centre, New York, NY, USA
| | - Alberto Vaiarelli
- IVIRMA Global Research Alliance, GENERA, Clinica Valle Giulia, Rome, Italy
| | - Carlo Alviggi
- Department of Public Health, Federico II University, Naples, Italy
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Canon C, Thurman A, Li A, Hernandez-Nieto C, Lee JA, Roth RM, Slifkin R, Briton-Jones C, Stein D, Copperman AB. Assessing the clinical viability of micro 3 pronuclei zygotes. J Assist Reprod Genet 2023; 40:1765-1772. [PMID: 37227570 PMCID: PMC10352191 DOI: 10.1007/s10815-023-02830-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 05/09/2023] [Indexed: 05/26/2023] Open
Abstract
PURPOSE What is the rate of euploidy and clinical viability of embryos resulting from micro 3 pronuclei zygotes? METHODS Retrospective cohort analysis in a single, academic in vitro fertilization (IVF) center from March 2018 to June 2021. Cohorts were separated by fertilization as either a 2 pronuclear zygote (2PN) or micro 3 pronuclear zygote (micro 3PN). PGT-A was performed to identify embryonic ploidy rates in embryos created from micro 3PN zygotes. The clinical outcomes of all transferred euploid micro 3PN zygotes were evaluated from frozen embryo transfer (FET) cycles. RESULTS During the designated study period, 75,903 mature oocytes were retrieved and underwent ICSI. Of these, 60,161 were fertilized as 2PN zygotes (79.3%) and 183 fertilized as micro 3PN zygotes (0.24%). Of the micro 3PN-derived embryos that underwent biopsy, 27.5% (n=11/42) were deemed euploid by PGT-A, compared to 51.4% (n=12,301/23,923) of 2PN-derived embryos, p=0.06. Four micro 3PN-derived embryos were transferred in subsequent single euploid FET cycles, which includes one live birth and one ongoing pregnancy. CONCLUSION Micro 3PN zygotes that develop to the blastocyst stage and meet the criteria for embryo biopsy have the potential to be euploid by preimplantation genetic testing for aneuploidy (PGT-A) and if selected for transfer can achieve a live birth. Although there are a significantly lower number of micro 3PN embryos that make it to blastocyst biopsy, the potential to continue to culture abnormally fertilized oocytes may give these patients a chance at pregnancy that they previously did not have.
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Affiliation(s)
- Chelsea Canon
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, Klingenstein Pavilion, 9th Floor, 1176 Fifth Avenue, New York, NY, 10029, USA.
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA.
| | - Anabel Thurman
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Albert Li
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Carlos Hernandez-Nieto
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Joseph A Lee
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Rose Marie Roth
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Richard Slifkin
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Christine Briton-Jones
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Daniel Stein
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, Klingenstein Pavilion, 9th Floor, 1176 Fifth Avenue, New York, NY, 10029, USA
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
| | - Alan B Copperman
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, Klingenstein Pavilion, 9th Floor, 1176 Fifth Avenue, New York, NY, 10029, USA
- Reproductive Medicine Associates of New York, 635 Madison Avenue, 10th Floor, New York, NY, 10022, USA
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Wang T, Si J, Wang B, Yin M, Yu W, Jin W, Lyu Q, Long H. Prediction of live birth in vitrified-warmed 1PN-derived blastocyst transfer: Overall quality grade, ICM, TE, and expansion degree. Front Physiol 2022; 13:964360. [DOI: 10.3389/fphys.2022.964360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 10/24/2022] [Indexed: 11/11/2022] Open
Abstract
Background: Numerous studies have reported that transfer of blastocysts derived from monopronuclear (1PN) zygotes achieved live births. However, the potential value of morphology grading for the prediction of 1PN blastocyst viability is unclear, and the blastocyst selection criterion for successful pregnancy has not been set up yet. The aim of this study is to assess the ability of the blastocyst morphology grading system based on three parameters, namely, inner cell mass (ICM), trophectoderm (TE), and expansion degree and to predict outcomes of a cycle with single 1PN blastocyst transfer.Methods: A total of 266 vitrified-warmed 1PN-derived blastocyst transfer cycles for IVF treatment at Shanghai Ninth People’s Hospital between 2007 and 2020 were included. The study was performed on single blastocyst transfers. Electronic records of patients were retrospectively analyzed. In the current study, the blastocysts were classified into three groups: “good,” 3-6AA, 3-6AB, 3-6BA; “medium,” 3-6BB, 3-6AC, 3-6CA; and “poor,” 3-6BC, 3-6CB, 3-6CC. The basal characteristics, embryo grading, and clinical outcomes were compared between the three groups. The association of morphology parameters with pregnancies and live births was analyzed. Logistic regression was adopted to set up a prediction model of live births.Results: Transfer of the good-quality blastocysts achieved significant higher pregnancies (biochemical pregnancy: 59%; clinical pregnancy: 56.4%, and live birth 48.7%) than those in the group of the medium (biochemical pregnancy: 59%; clinical pregnancy: 49.6%; live birth: 40.4%) or poor-quality (biochemical pregnancy: 38.4%; clinical pregnancy: 34.9%; live birth: 26.7%) blastocysts (p < 0.05). There was a significant association between ICM and live birth. A prediction model of live births involving ICM, TE, and expansion degree was set up.Conclusion: In 1PN transfer cycles, a higher overall blastocyst quality is shown to correlate most strongly with optimal pregnancy and live birth outcomes. The selection of high-quality blastocysts for transfer should consider the ICM score first. The prediction model of live births based on ICM, TE, and expansion degree may help predict successful pregnancy in 1PN single-blastocyst transfer cycles.
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Wei X, Enatsu N, Furuhashi K, Iwasaki T, Kokeguchi S, Shiotani M, Otsuki J. Developmental trajectory of monopronucleated zygotes after in vitro fertilization when they include both male and female genomes. Fertil Steril 2021; 117:213-220. [PMID: 34548166 DOI: 10.1016/j.fertnstert.2021.08.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 08/15/2021] [Accepted: 08/19/2021] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To examine the cause of monopronucleated zygote (1PN) formation that includes both maternal and paternal genomes. DESIGN Retrospective cohort study. SETTING Private fertility clinic. PATIENT(S) A total of 44 1PN and 726 2-pronuclear zygotes from 702 patients were observed using 2 different time-lapse observation systems. INTERVENTION(S) Previously recorded time lapse data were reviewed to examine the mechanism of 1PN formation. MAIN OUTCOME MEASURE(S) The distance between the position of the second polar body extrusion and the fertilization cone or epicenter/starting position of the cytoplasmic wave was measured, and the consequent data were analyzed. Cytoplasmic waves were confirmed using vector analysis software. RESULT(S) The cut-off value for the difference in the distance between the position of the second polar body extrusion and the fertilization cone or the epicenter/starting position of the cytoplasmic wave was 17 μm (AUC: 0.987, 95% CI: 0.976-0.999) for the Embryo Scope and 18 μm (AUC: 0.972, 95% CI: 0.955-0.988) for the iBIS time-lapse observation systems. CONCLUSION(S) In this study, it was found with a high degree of accuracy that a monopronucleus is formed when the fusion of the sperm takes place within 18 μm from the point of the second polar body extrusion. The theoretical chance of 1PN occurrence after in vitro fertilization is 2.7% when the sperm is considered to be fused anywhere in the plasma membrane of an oocyte.
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Affiliation(s)
- Xingqiang Wei
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan; Hanabusa Women's Clinic, Kobe, Japan
| | | | | | | | | | | | - Junko Otsuki
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan; Hanabusa Women's Clinic, Kobe, Japan; Assisted Reproductive Technology Center, Okayama University, Okayama, Japan.
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Coticchio G, Barrie A, Lagalla C, Borini A, Fishel S, Griffin D, Campbell A. Plasticity of the human preimplantation embryo: developmental dogmas, variations on themes and self-correction. Hum Reprod Update 2021; 27:848-865. [PMID: 34131722 DOI: 10.1093/humupd/dmab016] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/27/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND IVF for the treatment of infertility offers unique opportunities to observe human preimplantation development. Progress in time-lapse technology (TLT) and preimplantation genetic testing (PGT) has greatly expanded our knowledge of developmental patterns leading to a healthy pregnancy or developmental failure. These technologies have also revealed unsuspected plastic properties of the preimplantation embryo, at macromolecular, cellular and multicellular levels. OBJECTIVE AND RATIONALE This review focuses on the emerging concept of plasticity of the human embryo as revealed by recent evidence derived from TLT and PGT, calling for an updated and more precise redefinition of the boundaries between normal and abnormal development. SEARCH METHODS PubMed was used to search the MEDLINE database for peer-reviewed English-language original articles and reviews concerning human preimplantation development. Cross-searches were performed by adopting 'fertilisation', 'pronucleus', 'cleavage', 'multinucleation', 'compaction', 'embryo', 'preimplantation genetic testing', 'aneuploidy', mosaicism', 'micromanipulation', 'time-lapse microscopy' and 'IVF/assisted reproduction' as main terms. The most relevant publications, i.e. those concerning major phenomena occurring during normal and abnormal development-with a focus on the human species-were assessed and discussed critically. OUTCOMES Advances in TLT and PGT have revealed an astonishing plasticity and self-correction ability of the human preimplantation embryo in vitro. At fertilisation, an abnormal number of pronuclei do not always result in the formation of an aneuploid blastocyst. Animal studies and preliminary human observations indicate that combining of parental genomes may occur at the early cleavage stage, if not at fertilisation. Multinucleation occurs with much higher prevalence than previously thought and may be corrected at later cleavage stages. Irregular cleavage (multichotomous, direct, rapid and reverse cleavages) can generate chromosome segregation abnormalities that often lead to developmental arrest, but that sporadically may be confined to cells excluded from the blastocyst, and may sometimes result in viable pregnancy. Mitotic errors can generate mosaic blastocysts, but alternatively normal embryos may form from selective death or clonal depletion of aneuploid cells. WIDER IMPLICATIONS Deviations from developmental dogmas and the increasing evidence of plasticity of the human embryo challenge current embryological notions and suggest the need to write new rules governing cell cycle, cell determination and chromosome segregation during preimplantation development.
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Affiliation(s)
| | | | | | | | - Simon Fishel
- CARE Fertility Group, Northampton, UK.,School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, UK
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Uzun KN, Cıncık M, Selam B, Takmaz Ö, Uyar E. Comparison of the rates for reaching the blastocyst stage between normal and abnormal pronucleus embryos monitored by a time-lapse system in IVF patients. J Turk Ger Gynecol Assoc 2021; 22:120-126. [PMID: 33041260 PMCID: PMC8187983 DOI: 10.4274/jtgga.galenos.2020.2020.0033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 07/20/2020] [Indexed: 12/01/2022] Open
Abstract
Objective To compare the rates of blastocyst stage development between embryos fertilized after one (MPN) or more than two pronucleus (PN) (3PN, 4PN-multiPN) with those after 2PN in the same patients. Material and Methods The embryos of patients who had both abnormal PN (MPN, 3PN or 4PN) and normal fertilized (2PN) embryos after intracytoplasmic sperm injection (ICSI) fertilization, were followed with a time-lapse system following the ICSI procedure. The rates of reaching the blastocyst stage were compared between normal and abnormally fertilized embryos. Results One thousand eight hundred and twenty oocytes were collected from 140 patients and 1280 (70.3%) of them were fertilized. MPN, 2PN and 3PN, 4PN (multiPN) ratios of the embryos in the pronuclear stage were 11.4%, 83.13% and 5.47%, respectively. The rates of reaching the blastocyst stage among these embryos were 17.1%, 60.8% and 42.8% for MPN, 2PN and multiPN, respectively. The proportion reaching blastocyst development was significantly higher following 2PN compared to those after MPN and multiPN (p<0.05). Embryos developing after multiPN had significantly higher rates of reaching the blastocyst stage compared to those after MPN (p<0.01). Conclusion The majority of abnormally pronucleated embryos arrest without reaching the blastocyst stage. MultiPN embryos have a higher rate of blastocyst development than MPN embryos.
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Affiliation(s)
- Kübra Nur Uzun
- PhD Student, Institute of Health Sciences, İstanbul Medipol University, İstanbul, Turkey
| | - Mehmet Cıncık
- Department of Histology and Embryology, Maltepe University Faculty of Medicine, İstanbul, Turkey
| | - Belgin Selam
- Department of Obstetrics and Gynecology, Acıbadem Mehmet Ali Aydınlar University Faculty of Medicine, İstanbul, Turkey
| | - Özgüç Takmaz
- Department of Obstetrics and Gynecology, Acıbadem Mehmet Ali Aydınlar University Faculty of Medicine, İstanbul, Turkey
| | - Esra Uyar
- Unit of ART, Acıbadem Altunizade Hospital, İstanbul, Turkey
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Soler N, Bautista-Llàcer R, Escrich L, Oller A, Grau N, Tena R, Insua MF, Ferrer P, Escribà MJ, Vendrell X. Rescuing monopronucleated-derived human blastocysts: a model to study chromosomal topography and fingerprinting. Fertil Steril 2021; 116:583-596. [PMID: 33926715 DOI: 10.1016/j.fertnstert.2021.03.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 03/23/2021] [Accepted: 03/23/2021] [Indexed: 12/27/2022]
Abstract
OBJECTIVE To quantify the percentage of monopronuclear-derived blastocysts (MNBs) that are potentially useful for reproductive purposes using classic and state-of-the-art chromosome analysis approaches, and to study chromosomal distribution in the inner cell mass (ICM) and trophectoderm (TE) for intertissue/intratissue concordance comparison. DESIGN Prospective experimental study. SETTING Single-center in vitro fertilization clinic and reproductive genetics laboratory. PATIENT(S) A total of 1,128 monopronuclear zygotes were obtained between June 2016 and December 2018. INTERVENTION(S) MNBs were whole-fixed or biopsied to obtain a portion of ICM and 2 TE portions (TE1 and TE2) and were subsequently analyzed by fluorescence in situ hybridization, new whole-genome sequencing, and fingerprinting by single-nucleotide polymorphism array-based techniques (a-SNP). MAIN OUTCOME MEASURE(S) We assessed MNB rate, ploidy rate, and chromosomal constitution by new whole-genome sequencing, and parental composition by comparative a-SNP, performed in a "trio"-format (embryo/parents). The 24-chromosome distribution was compared between the TE and the ICM and within the TE. RESULT(S) A total of 18.4% of monopronuclear zygotes progressed to blastocysts; 77.6% of MNBs were diploid; 20% of MNBs were male and euploid, which might be reproductively useful. Seventy-five percent of MNBs were biparental and half of them were euploid, indicating that 40% might be reproductively useful. Intratissue concordance (TE1/TE2) was established for 93.3% and 73.3% for chromosome matching. Intertissue concordance (TE/ICM) was established for 78.8%, but 57.6% for chromosome matching. When segmental aneuploidy was not considered, intratissue concordance and chromosome matching increased to 100% and 80%, respectively, and intertissue concordance and chromosome matching increased to 84.8% and 75.8%, respectively. CONCLUSION(S) The a-SNP-trio strategy provides information about ploidy, euploidy, and parental origin in a single biopsy. This approach enabled us to identify 40% of MNBs with reproductive potential, which can have a significant effect in the clinical setting. Additionally, segmental aneuploidy is relevant for mismatched preimplantation genetic testing of aneuploidies, both within and between MNB tissues. Repeat biopsy might clarify whether segmental aneuploidy is a prone genetic character.
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Affiliation(s)
- Nuria Soler
- IVF Laboratory, IVI-RMA-València, Valencia, Spain; IVI Foundation, Valencia, Spain; Department of Pediatrics, Obstetrics and Gynaecology, University of Valencia, Valencia, Spain
| | | | | | - Andrea Oller
- Reproductive Genetics Unit, Sistemas Genómicos, Paterna, Valencia, Spain
| | - Noelia Grau
- IVF Laboratory, IVI-RMA-València, Valencia, Spain
| | - Raquel Tena
- Citogenomics Unit, Sistemas Genómicos, Paterna, Valencia, Spain
| | | | - Paloma Ferrer
- Citogenomics Unit, Sistemas Genómicos, Paterna, Valencia, Spain
| | - María-José Escribà
- IVF Laboratory, IVI-RMA-València, Valencia, Spain; IVI Foundation, Valencia, Spain; Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Valencia, Spain.
| | - Xavier Vendrell
- Reproductive Genetics Unit, Sistemas Genómicos, Paterna, Valencia, Spain
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Hu J, Molinari E, Darmon S, Zhang L, Patrizio P, Barad DH, Gleicher N. Predictive value of cytoplasmic granulation patterns during in vitro fertilization in metaphase II oocytes: Part I, poor-prognosis patients. Fertil Steril 2021; 116:431-443. [PMID: 33865566 DOI: 10.1016/j.fertnstert.2021.02.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/09/2021] [Accepted: 02/11/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To determine whether 4 cytoplasmic granulation patterns of human metaphase II oocytes have a predictive value for in vitro fertilization outcomes. DESIGN A retrospective cohort study. SETTING An academically affiliated private clinical infertility and research center. PATIENT(S) A total of 2,690 consecutive fresh autologous oocytes collected from women aged 41.2 ± 5.0 years between 2017 and 2019. INTERVENTION(S) Determination of granulation pattern in every oocyte during intracytoplasmic sperm injection as fine, central, dispersed, and newly introduced uneven granulations. MAIN OUTCOME MEASURE(S) Fertilization outcomes (2 pronuclei [2PN], <2PN, and >2PN rates), pregnancy, and live birth rates for different granulation patterns at different ages. RESULT(S) Fine granulation produced the highest 2PN rate, followed by central, uneven, and dispersed granulation (91.8%, 83.9%, 77.9%, and 54.8%, respectively). Differences in fertilization were surprisingly relatively independent of age and other variables. Overall, compared with fine granulation, dispersed granulation resulted in lower pregnancy rates (4.6% vs. 10.7%) and known-outcome analysis (1.3% vs. 5.6%) as well as lower live birth rates (3.0% vs. 8.9%) and known-outcome analysis (0.6% vs. 5.6%). The known-outcome analysis demonstrated that uneven granulation had lower live birth rates than fine granulation (2.3% vs. 5.6%). Unexpectedly, the ooplasm granulation patterns were largely disassociated from embryo morphologic grades. CONCLUSION(S) We, for the first time, demonstrated that 4 distinct cytoplasmic granulation patterns in metaphase II oocytes had, largely independent of age and other variables, a predictive value for fertilization, pregnancy, and live birth outcomes in in vitro fertilization cycles of poor-prognosis patients. These data suggest that upstream ooplasm granulation patterns deserve closer attention in terms of embryo selection.
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Affiliation(s)
- Jianjun Hu
- The Center for Human Reproduction, New York, New York.
| | | | - Sarah Darmon
- The Center for Human Reproduction, New York, New York
| | - Lin Zhang
- The Center for Human Reproduction, New York, New York
| | - Pasquale Patrizio
- Department of Obstetrics and Gynecology and Reproductive Sciences, Yale University Medical School, New Haven, Connecticut
| | - David H Barad
- The Center for Human Reproduction, New York, New York; The Foundation for Reproductive Medicine, New York, New York
| | - Norbert Gleicher
- The Center for Human Reproduction, New York, New York; The Foundation for Reproductive Medicine, New York, New York; Stem Cell Biology and Molecular Embryology Laboratory, Rockefeller University, New York, New York; Department of Obstetrics and Gynecology, Vienna University School of Medicine, Vienna, Austria
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10
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Cimadomo D, Capalbo A, Scarica C, Sosa Fernandez L, Rienzi L, Ciriminna R, Minasi MG, Novelli A, De Santis L, Zuccarello D. When embryology meets genetics: the definition of developmentally incompetent preimplantation embryos (DIPE)-the consensus of two Italian scientific societies. J Assist Reprod Genet 2021; 38:319-331. [PMID: 33236289 PMCID: PMC7884494 DOI: 10.1007/s10815-020-02015-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023] Open
Abstract
A clear definition of developmentally incompetent preimplantation embryo (DIPE) in literature is still missing, while several scientific societies are discussing this challenging topic. From both a clinical and scientific perspective, the identification of embryos unfit for reproductive purpose is crucial. This aim should be pursued in light of all diagnostic technologies for embryo evaluation, encompassing also genetic analyses, of recent implementation in IVF. The Italian context is characterized by an unusual scenario: embryos can be discarded only if not viable and cannot be used for research purposes either. Therefore, thousands of embryos, diagnosed as affected and/or aneuploid as resulting from preimplantation genetic testing (PGT) and clinically not utilizable, are cryopreserved and stored indefinitely, with important psychological, legal, and financial implications. With the aim of updating the definition of DIPE, also on the basis of the embryo genetic status, the Italian Society of Embryology, Reproduction and Research (SIERR) and the Italian Society of Human Genetic (SIGU) reviewed the literature on this topic, found a consensus, and produced a list of relevant criteria.
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Affiliation(s)
- Danilo Cimadomo
- GeneraLife IVF centers, Clinica Valle Giulia, via G. de Notaris 2b, 00197, Rome, Italy.
| | | | - Catello Scarica
- Center for Reproductive Medicine, Casa di Cura Villa Salaria in Partnership with Institut Marques, Rome, Italy
| | | | - Laura Rienzi
- GeneraLife IVF centers, Clinica Valle Giulia, via G. de Notaris 2b, 00197, Rome, Italy
| | | | | | - Antonio Novelli
- Laboratory of Medical Genetics, IRCCS-Bambino Gesù Children's Hospital, Rome, Italy
| | - Lucia De Santis
- Department of Obstetrics & Gynecology, IVF Unit, San Raffaele Scientific Institute, Vita-Salute San Raffaele University, Milan, Italy
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11
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Chen X, Shi S, Mao J, Zou L, Yu K. Developmental Potential of Abnormally Fertilized Oocytes and the Associated Clinical Outcomes. Front Physiol 2020; 11:528424. [PMID: 33250770 PMCID: PMC7672117 DOI: 10.3389/fphys.2020.528424] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/16/2020] [Indexed: 11/13/2022] Open
Abstract
This study aims to investigate the embryo development potential of extending the culture of abnormally fertilized zygotes with no pronuclear (0PN), monopronuclear (1PN), and poor-quality day 3 embryos and to determine the associated clinical outcomes. This is a retrospective study performed between January 2014 and May 2018 at Jinhua People's Hospital. The normal developed embryos and the abnormal 0PN, 1PN, and poor-quality day 3 embryos were cultured to day 5 or 6 for embryo transfer. Clinical outcomes resulting from abnormal embryos and normally developed embryos were compared. A total of 6466 embryos (1542 0PN, 852 1PN, and 4072 poor-quality day 3 embryos) from 831 treatment cycles were cultured to the blastocyst stage. The total blastulation rate was 17.3% (1121/6466) with 18.2% in 0PN, 26.1% in 1PN, and 15.2% in poor-quality day 3 embryos. The rate for good-quality blastocyst formation was 9.5% (616/6466) with 11.2% in 0PN group, 14.8% in 1PN group, and 7.8% in poor-quality day 3 embryos, respectively. Blastulation rates of 0PN and 1PN derived from intracytoplasmic sperm injection (ICSI) were significantly lower compared with the in vitro fertilization group. A total of 243 cycles were transferred with blastocysts originating from abnormal embryos, resulting in 109 (44.9%) clinical pregnancies and 19 (17.4%) miscarriages; in the control group, a total of 350 cycles resulted in 214 (61.1%) clinical pregnancies and 18 (8.4%) miscarriages. The live birth rate was significantly lower in the abnormal embryo group than that in the control group. Collectively, conventional in vitro fertilization derived 0PN and 1PN zygotes, not ICSI, together with day 3 embryos with poor quality, that were able to reach the blastocyst stage and produce a fair pregnancy rate and live birth rate.
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Affiliation(s)
- Xiao Chen
- Reproductive Medicine Center, Jinhua People's Hospital, Jinhua, China
| | - Shuai Shi
- Reproductive Medicine Center, Jinhua People's Hospital, Jinhua, China
| | - Jiating Mao
- Reproductive Medicine Center, Jinhua People's Hospital, Jinhua, China
| | - Libo Zou
- Reproductive Medicine Center, Jinhua People's Hospital, Jinhua, China
| | - Keda Yu
- Reproductive Medicine Center, Jinhua People's Hospital, Jinhua, China
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12
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Hirata K, Goto S, Izumi Y, Taguchi M, Hayashi A, Fujioka M, Ishiko A, Nakanishi K, Kimura F, Murakami T. Chromosome analysis of blastocysts derived from single pronuclear zygotes by array CGH and clinical outcomes by the transfer of single pronuclear zygotes. J Assist Reprod Genet 2020; 37:1645-1652. [PMID: 32415641 PMCID: PMC7376778 DOI: 10.1007/s10815-020-01800-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 04/17/2020] [Indexed: 11/28/2022] Open
Abstract
PURPOSE This study aimed to explore the aneuploidy of blastocysts derived from single pronuclear (1PN) zygotes, almost 75% of which were regarded as diploid, using array CGH and examine the pregnancy outcomes. METHODS Embryonic aneuploidy screening of sixteen embryos from 1PN zygotes and sixteen embryos from 2PN zygotes was performed using array CGH in study 1. In addition, the reproductive outcome of 1761 single blastocysts, after untested frozen-thawed blastocyst transfer in IVF/ICSI patients, was retrospectively analyzed and compared between the 1PN and 2PN groups in study 2. RESULTS The aneuploidy rates were 30.8% (4/13) in 1PN IVF, 33.3% (1/3) in 1PN ICSI, 46.2% (6/13) in 2PN IVF, and 100% (3/3) in 2PN ICSI. The 1PN group achieved clinical pregnancy in 25.0% (7/28) of IVF and 30.0% (3/10) of ICSI, whereas these rates in the 2PN control group were 44.6% (557/1250) of IVF and 37.4% (177/473) of ICSI. No miscarriage occurred in the pregnancies from 1PN zygotes, whereas the rates of miscarriage in the 2PN control group were 22.6% (126/557) in IVF and 22.2% (39/176) in ICSI. The delivery rate was similar in all groups. Ten deliveries in the 1PN group showed no newborn malformation. CONCLUSION Within the limits of the small sample size, our results suggest that the aneuploidy and delivery rates of the blastocysts derived from 1PN zygotes are the same as those derived from 2PN zygotes. Blastocysts derived from 1PN zygotes may be used clinically and could increase the chance of pregnancy.
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Affiliation(s)
| | - Sakae Goto
- Goto Ladies Clinic, Takatsuki, Osaka, Japan
| | - Yoko Izumi
- Goto Ladies Clinic, Takatsuki, Osaka, Japan
| | | | | | | | - Akiko Ishiko
- Department of Obstetrics and Gynecology, Shiga University of Medical Science, Otsu, Shiga, Japan
| | | | - Fuminori Kimura
- Department of Obstetrics and Gynecology, Shiga University of Medical Science, Otsu, Shiga, Japan
| | - Takashi Murakami
- Department of Obstetrics and Gynecology, Shiga University of Medical Science, Otsu, Shiga, Japan
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13
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Totonchi M, Babaabasi B, Najafi H, Rezazadeh Valojerdi M, Eftekhari-Yazdi P, Karimian L, Almadani N, Mohseni Meybodi A, Kimiai M, Mashayekhi M, Madani T, Gourabi H. Preimplantation Genetic Screening and The Success Rate of In Vitro Fertilization: A Three-Years Study on Iranian Population. CELL JOURNAL 2020; 22:467-475. [PMID: 32347040 DOI: 10.22074/cellj.2021.6784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 07/21/2019] [Indexed: 12/18/2022]
Abstract
Objective In vitro fertilization (IVF) is one of the most efficient approaches within the context of assisted reproductive technology (ART) to treat infertility. High pregnancy rates have become the major index of successful IVF in clinical studies. It is not clear yet which factors are certainly responsible for IVF success, as various outcomes were obtained in different IVF centers with different settings. In this study, we aimed to address controversies in the interpretation of promising results of IVF with respect to preimplantation genetic screening (PGS). Materials and Methods In this retrospective case series study, we built a dataset containing data from 213 IVF patient candidates for PGS (654 embryos) with blastomere biopsy at day 3 and trophectoderm biopsy in day 5, referred to Royan Institute, Tehran, Iran from 2015 to 2018. Next, the data were analyzed to find influential factors affecting success rate of ART cycles. Results Data analyses showed that regardless of PGS indications (ART failures, recurrent miscarriage, chromosomal abnormalities, etc.), the pregnancy rate is influenced by maternal and embryonic factors such as the age of mother as well as quantity and quality of transferred embryos. Furthermore, genotyping of embryos using array comparative genomic hybridization (aCGH) depicted the highest rate of chromosomal aberrations for chromosomes 1, 16 and 19 while the lowest frequency for chromosomes 11 and 17. Similarly, we detected 463 genetically abnormal embryos by aCGH, among which only 41.9% could be detected by classical fluorescent in situ hybridization (FISH) method. Conclusion This study not only highlighted the advantages of aCGH over the FISH method in detection of chromosomal abnormalities, but also emphasized the importance of genetic abnormality as an indication for determination of IVF success rate.
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Affiliation(s)
- Mehdi Totonchi
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.,Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Babak Babaabasi
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Hadi Najafi
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.,Departments of Genetics, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Mojtaba Rezazadeh Valojerdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Poopak Eftekhari-Yazdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Lila Karimian
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Navid Almadani
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Anahita Mohseni Meybodi
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Morteza Kimiai
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Mehri Mashayekhi
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Tahereh Madani
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Hamid Gourabi
- Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran. Electronic Address:.,Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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14
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Value of transferring embryos derived from monopronucleated (1PN) zygotes at the time of fertilization assessment. ZYGOTE 2020; 28:241-246. [DOI: 10.1017/s096719942000009x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryThis paper is a retrospective analysis of the sole transfer of monopronucleated zygotes (1PN) embryos both in in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) to determine the value of transferring embryos formed from 1PN. In fresh cycles, 1PN cleavage-stage embryos (1PN cleavage fresh) were transferred. In frozen–thawed cycles, 1PN blastocyst-stage embryos (1PN blast frozen) were transferred. We used comparison groups: for fresh cycles, 2PN cleavage-stage embryos (2PN cleavage fresh) were transferred; and for frozen–thawed cycles, 2PN blastocyst-stage embryos (2PN blast frozen) were transferred. Comparison groups were matched for cycle and patient characteristics to the 1PN group. Finally, for fresh cycles, live birth rates (LBR) in the 1PN cleavage group were significantly lower than those in 2PN cleavage group, both for IVF [LBR = 7.64% vs. pregnancy rate (PR) = 22.12%, P = 0.003, respectively] and ICSI (LBR = 0% vs. LBR = 20.00%, P < 0.001, respectively). For frozen–thawed IVF cycles, the PR in the 1PN blastocyst group were comparable with those of the 2PN blastocyst group (1PN: LBR = 33.14% vs. 2PN: LBR = 37.24%, P = 0.289, respectively), while in ICSI, the PR in the 1PN blastocyst group were lower than those in the 2PN blastocyst group (LBR = 15.25% vs. LBR = 40.68%, P = 0.002, respectively). So, for IVF, blastocyst culture was capable of selecting normal 1PN embryos for transfer and achieves satisfying outcomes. However, for ICSI, blastocyst culture was not effective enough to eliminate abnormal embryos and 1PN embryo transfer needed to be treated with caution.
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15
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Morphokinetics and in vitro developmental potential of monopronucleated ICSI zygotes until the blastocyst stage. ZYGOTE 2020; 28:217-222. [DOI: 10.1017/s0967199420000027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryThe aim of this study was to provide a more comprehensive understanding of 1PN intracytoplasmic sperm injection (ICSI) zygotes. To achieve this objective, we assessed whether all 1PN-derived embryos showed a similar morphokinetic pattern, and if the morphokinetic behaviour of 1PN-derived embryos was comparable with that of 2PN-derived embryos. In total, 149 1PN ICSI zygotes (study group) and 195 2PN ICSI zygotes (control group) were included in the study. Embryo development potential was evaluated in terms of blastocyst rate. Morphokinetic parameters, including the pronucleus diameter and kinetics of in vitro development, were also analyzed. Embryos derived from 1PN ICSI zygotes showed impaired development compared with 2PN-derived embryos, with blastocyst rates of 28.9% and 67.2%, respectively. The diameter of the pronucleus of 1PN zygotes was larger than that of 2PN zygotes. When compared with 2PN-derived embryos, those derived from 1PN zygotes had a visible pronucleus for a shorter time, in addition to a longer syngamy time and slower kinetic behaviour from two to nine cells. When 1PN-derived blastocysts and 2PN-derived blastocysts were compared, the developmental kinetics were similar in both groups, except for a delayed and longer duration of the compaction phase in 1PN-derived embryos. In conclusion, monopronucleated ICSI zygotes present differences in developmental capacity and morphokinetic behaviour compared with 2PN ICSI zygotes, showing particular morphokinetic parameters related to pronucleus formation. Only the 1PN ICSI-derived embryos that reached the blastocyst stage have similar morphokinetic development to blastocysts from 2PN zygotes.
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16
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Evans MB, Hill MJ, Levens ED. Should we transfer monopronuclear embryos? More data and even more questions. Fertil Steril 2019; 112:475-476. [PMID: 31371058 DOI: 10.1016/j.fertnstert.2019.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Accepted: 06/03/2019] [Indexed: 11/19/2022]
Affiliation(s)
- M Blake Evans
- Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
| | - Micah J Hill
- Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland
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17
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Destouni A, Dimitriadou E, Masset H, Debrock S, Melotte C, Van Den Bogaert K, Zamani Esteki M, Ding J, Voet T, Denayer E, de Ravel T, Legius E, Meuleman C, Peeraer K, Vermeesch JR. Genome-wide haplotyping embryos developing from 0PN and 1PN zygotes increases transferrable embryos in PGT-M. Hum Reprod 2019; 33:2302-2311. [PMID: 30383227 PMCID: PMC6238370 DOI: 10.1093/humrep/dey325] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 10/14/2018] [Indexed: 02/06/2023] Open
Abstract
STUDY QUESTION Can genome-wide haplotyping increase success following preimplantation genetic testing for a monogenic disorder (PGT-M) by including zygotes with absence of pronuclei (0PN) or the presence of only one pronucleus (1PN)? SUMMARY ANSWER Genome-wide haplotyping 0PNs and 1PNs increases the number of PGT-M cycles reaching embryo transfer (ET) by 81% and the live-birth rate by 75%. WHAT IS KNOWN ALREADY Although a significant subset of 0PN and 1PN zygotes can develop into balanced, diploid and developmentally competent embryos, they are usually discarded because parental diploidy detection is not part of the routine work-up of PGT-M. STUDY DESIGN, SIZE, DURATION This prospective cohort study evaluated the pronuclear number in 2229 zygotes from 2337 injected metaphase II (MII) oocytes in 268 cycles. PGT-M for 0PN and 1PN embryos developing into Day 5/6 blastocysts with adequate quality for vitrification was performed in 42 of the 268 cycles (15.7%). In these 42 cycles, we genome-wide haplotyped 216 good quality embryos corresponding to 49 0PNs, 15 1PNs and 152 2PNs. The reported outcomes include parental contribution to embryonic ploidy, embryonic aneuploidy, genetic diagnosis for the monogenic disorder, cycles reaching ETs, pregnancy and live birth rates (LBR) for unaffected offspring. PARTICIPANTS/MATERIALS, SETTING, METHODS Blastomere DNA was whole-genome amplified and hybridized on the Illumina Human CytoSNP12V2.1.1 BeadChip arrays. Subsequently, genome-wide haplotyping and copy-number profiling was applied to investigate the embryonic genome architecture. Bi-parental, unaffected embryos were transferred regardless of their initial zygotic PN score. MAIN RESULTS AND THE ROLE OF CHANCE A staggering 75.51% of 0PN and 42.86% of 1PN blastocysts are diploid bi-parental allowing accurate genetic diagnosis for the monogenic disorder. In total, 31% (13/42) of the PGT-M cycles reached ET or could repeat ET with an unaffected 0PN or 1PN embryo. The LBR per initiated cycle increased from 9.52 to 16.67%. LIMITATIONS, REASONS FOR CAUTION The clinical efficacy of the routine inclusion of 0PN and 1PN zygotes in PGT-M cycles should be confirmed in larger cohorts from multicenter studies. WIDER IMPLICATIONS OF THE FINDINGS Genome-wide haplotyping allows the inclusion of 0PN and 1PN embryos and subsequently increases the cycles reaching ET following PGT-M and potentially PGT for aneuploidy (PGT-A) and chromosomal structural rearrangements (PGT-SR). Establishing measures of clinical efficacy could lead to an update of the ESHRE guidelines which advise against the use of these zygotes. STUDY FUNDING/COMPETING INTEREST(S) SymBioSys (PFV/10/016 and C1/018 to J.R.V. and T.V.), the Horizon 2020 WIDENLIFE: 692065 to J.R.V., T.V., E.D., A.D. and M.Z.E. M.Z.E., T.V. and J.R.V. co-invented haplarithmisis (‘Haplotyping and copy-number typing using polymorphic variant allelic frequencies’), which has been licensed to Agilent Technologies. H.M. is fully supported by the (FWO) (ZKD1543-ASP/16). The authors have no competing interests to declare.
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Affiliation(s)
- Aspasia Destouni
- Laboratory for Cytogenetics and Genome Research, Center for Human Genetics, University of Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Eftychia Dimitriadou
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Heleen Masset
- Laboratory for Cytogenetics and Genome Research, Center for Human Genetics, University of Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Sophie Debrock
- University Hospitals Leuven, Leuven University Fertility Center, Herestraat 49, Leuven, Belgium
| | - Cindy Melotte
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Kris Van Den Bogaert
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Masoud Zamani Esteki
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium.,Maastricht University Medical Center, Department of Clinical Genetics, GROW School for Oncology and Developmental Biology, Maastricht, The Netherlands
| | - Jia Ding
- Laboratory for Cytogenetics and Genome Research, Center for Human Genetics, University of Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Thiery Voet
- Laboratory of Reproductive Genomics, Center for Human Genetics, University of Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium.,Wellcome Sanger Institute, Wellcome Genome Campus Hinxton, Cambridgeshire, UK
| | - Ellen Denayer
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Thomy de Ravel
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Eric Legius
- Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
| | - Christel Meuleman
- University Hospitals Leuven, Leuven University Fertility Center, Herestraat 49, Leuven, Belgium
| | - Karen Peeraer
- University Hospitals Leuven, Leuven University Fertility Center, Herestraat 49, Leuven, Belgium
| | - Joris R Vermeesch
- Laboratory for Cytogenetics and Genome Research, Center for Human Genetics, University of Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium.,Department of Human Genetics, Center for Human Genetics, University Hospitals Leuven, O&N I Herestraat 49, KU Leuven, Leuven, Belgium
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18
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The influence of clinical and laboratory factors on the formation of monopronucleated zygotes after intracytoplasmic sperm injection (ICSI). ZYGOTE 2019; 27:64-68. [DOI: 10.1017/s0967199418000473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryThe aim of the present study was to determine whether clinical or laboratory factors can influence the development of single pronucleated zygotes (1PN) and two polar bodies (PB) after ICSI. In total, 341 ICSI cycles performed at FertiClinic-Villa Margherita from January 2012 to December 2014 were enrolled in the study. Group A included 240 cycles with no 1PN−2PB while group B included 101 cycles with one or more 1PN−2PB. Age, stimulation protocol, infertility factor, amount of gonadotropin administered, duration of therapy, peak estradiol levels, number of follicles at maturation triggering, oocytes retrieved and mature oocytes, time between retrieval and injection and sperm characteristics were compared between groups. In opposition to previous results showing no relationship between 1PN occurrence and clinical or laboratory variables, we observed that 1PN−2PB zygote formation seems to be associated with a lower female age, higher level of E2 and higher number of follicles on day of oocyte maturation triggering, higher number of astenozoospermic male patients, more oocytes retrieved at pick-up, more mature oocytes (MII) and longer time to injection.
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19
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Mutia K, Wiweko B, Iffanolida PA, Febri RR, Muna N, Riayati O, Jasirwan SO, Yuningsih T, Mansyur E, Hestiantoro A. The Frequency of Chromosomal Euploidy Among 3PN Embryos. J Reprod Infertil 2019; 20:127-131. [PMID: 31423415 PMCID: PMC6670263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
BACKGROUND The evaluation of embryo morphology is one of the most important parameters used to evaluate developmental timing, also providing an indication of chromosomal failure or degeneration. The first step in the evaluation of a fertilization event is determining the number and shape of the pronuclei (PN). Normally fertilized eggs possess two even PN. However, some embryos which develop from abnormally fertilized zygotes may be tri-pronuclear zygotes (3PN). METHODS Thirty embryos were collected from 12 women who underwent in vitro fertilization (IVF) at Dr. Cipto Mangunkusumo General Hospital in Jakarta, Indonesia. Embryos were cultured until the blastocyst stage on days 5-6. The blastomere biopsy was performed by piercing the zona pellucida with a laser under a microscope. Chromosomal numerical abnormalities were analyzed using Next Generation Sequencing (NGS). RESULTS Among the 30 embryos with 3PN zygotes, 33.3% had a normal chromosomal array, with 22 pairs of autosomes and 2 pairs of sex chromosomes. While the rest of sample population detected as abnormal chromosome (66.7%), with the highest percentage of abnormality was triploidy 43.3%, followed by mosaicism 13.4% and aneuploidy 10%. CONCLUSION This was a preliminary study revealed not all morphologically 3PN embryos are genetically abnormal.
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Affiliation(s)
- Kresna Mutia
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Budi Wiweko
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia,Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia,Yasmin IVF Clinic, Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia,Corresponding Author: Budi Wiweko, Human, Reproductive, Infertility and Family Planning, Research Cluster, Indonesian Medical, Education and Research Institute, 5th Floor Research Tower, Jalan Salemba Raya, No. 6, Jakarta Pusat, 10430, Indonesia, E-mail:
| | - Pritta Ameilia Iffanolida
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Ririn Rahmala Febri
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Naylah Muna
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Oki Riayati
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Shanty Olivia Jasirwan
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
| | - Tita Yuningsih
- Yasmin IVF Clinic, Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Eliza Mansyur
- Yasmin IVF Clinic, Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Andon Hestiantoro
- Human Reproductive, Infertility and Family Planning Research Center, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia,Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia,Yasmin IVF Clinic, Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
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20
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Xie PY, Tang Y, Hu L, Ouyang Q, Gu YF, Gong F, Leng LZ, Zhang SP, Xiong B, Lu GX, Lin G. Identification of biparental and diploid blastocysts from monopronuclear zygotes with the use of a single-nucleotide polymorphism array. Fertil Steril 2018; 110:545-554.e5. [DOI: 10.1016/j.fertnstert.2018.04.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 04/06/2018] [Accepted: 04/24/2018] [Indexed: 01/09/2023]
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21
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Araki E, Itoi F, Honnma H, Asano Y, Oguri H, Nishikawa K. Correlation between the pronucleus size and the potential for human single pronucleus zygotes to develop into blastocysts : 1PN zygotes with large pronuclei can expect an embryo development to the blastocyst stage that is similar to the development of 2PN zygotes. J Assist Reprod Genet 2018; 35:817-823. [PMID: 29479641 DOI: 10.1007/s10815-018-1137-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 02/08/2018] [Indexed: 10/17/2022] Open
Abstract
PURPOSE In this study, we examined the correlation between pronucleus size and the potential for human single pronucleus (1PN) zygotes to develop into blastocysts after IVF and ICSI. METHODS This study included 112 patients who underwent a total of 112 cycles of IVF/ICSI. To evaluate embryo development, 1PN zygotes were compared with 2PN zygotes in the same IVF/ICSI cycle (control cycles) using time-lapse live embryo imaging. To assess the potential for blastocyst formation, cutoff values for pronuclear area and diameter were established through receiver operating characteristic curve analysis, after which 1PN zygotes were classified based on those cutoff values. RESULTS Among 1PN zygotes cultured to day 5/6, the rate of embryo development was significantly lower than from 2PN zygotes. However, the rates of blastocyst formation and good quality blastocysts from 1PN zygotes with large pronuclear areas (≥ 710 μm2) or diameters (≥ 31 μm) were significantly higher than from 1PN zygotes with smaller pronuclear areas (≤ 509, 510-609, and 610-709 μm2) or diameters (≤ 24, 25-27,and 28-30 μm) (P < 0.01). Moreover, the results for 1PN zygotes with large pronuclei were similar to those for 2PN zygotes. CONCLUSIONS The developmental potential of 1PN zygotes with large pronuclear areas (≥ 710 μm2) or diameters (31 μm) appears to be similar to that of 2PN zygotes, and measurement of pronuclear area or diameter in 1PN zygotes is a simple, potentially useful, clinical method.
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Affiliation(s)
- Eri Araki
- Department of Infertility, Green Bell Clinic, Kitamachi 2-160, Toyota, Aichi, 471-0027, Japan
| | - Fumiaki Itoi
- Department of Infertility, Green Bell Clinic, Kitamachi 2-160, Toyota, Aichi, 471-0027, Japan.
| | - Hiroyuki Honnma
- Sapporo ART Clinic, Kita7jonishi 4-1-2, Kita-ku, Sapporo, Hokkaido, 060-0807, Japan
| | - Yukiko Asano
- Department of Infertility, Royal Bell Clinic, Midori-ku, Nagoya, Aichi, 458-0801, Japan
| | - Hisanori Oguri
- Department of Infertility, Royal Bell Clinic, Midori-ku, Nagoya, Aichi, 458-0801, Japan
| | - Kazuyo Nishikawa
- Department of Infertility, Green Bell Clinic, Kitamachi 2-160, Toyota, Aichi, 471-0027, Japan
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22
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Capalbo A, Treff N, Cimadomo D, Tao X, Ferrero S, Vaiarelli A, Colamaria S, Maggiulli R, Orlando G, Scarica C, Scott R, Ubaldi FM, Rienzi L. Abnormally fertilized oocytes can result in healthy live births: improved genetic technologies for preimplantation genetic testing can be used to rescue viable embryos in in vitro fertilization cycles. Fertil Steril 2017; 108:1007-1015.e3. [PMID: 28923286 DOI: 10.1016/j.fertnstert.2017.08.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 07/21/2017] [Accepted: 08/07/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To test whether abnormally fertilized oocyte (AFO)-derived blastocysts are diploid and can be rescued for clinical use. DESIGN Longitudinal-cohort study from January 2015 to September 2016 involving IVF cycles with preimplantation genetic testing for aneuploidy (PGT-A). Ploidy assessment was incorporated whenever a blastocyst from a monopronuclear (1PN) or tripronuclear zygote (2PN + 1 smaller PN; 2.1 PN) was obtained. SETTING Private IVF clinics and genetics laboratories. PATIENT(S) A total of 556 women undergoing 719 PGT-A cycles. INTERVENTION(S) Conventional chromosome analysis was performed on trophectoderm biopsies by quantitative polymerase chain reaction. For AFO-derived blastocysts, ploidy assessment was performed on the same biopsy with the use of allele ratios for hetorozygous SNPs analyzed by means of next-generation sequencing (1:1 = diploid; 2:1 = triploid; loss of heterozygosity = haploid). Balanced-diploid 1PN- and 2.1PN-derived blastocysts were transferred in the absence of normally fertilized transferable embryos. MAIN OUTCOME MEASURE(S) Ploidy constitution and clinical value of AFO-derived blastocysts in IVF PGT-A cycles. RESULT(S) Of the 5,026 metaphase II oocytes injected, 5.2% and 0.7% showed 1PN and 2.1PN, respectively. AFOs showed compromised embryo development (P<.01). Twenty-seven AFO-derived blastocysts were analyzed for ploidy constitution. The 1PN-derived blastocysts were mostly diploid (n = 9/13; 69.2%), a few were haploid (n = 3/13; 23.1%), and one was triploid (n = 1/13; 7.7%). The 2.1PN-derived blastocysts were also mostly diploid (n = 12/14; 85.7%), and the remainder were triploid. Twenty-six PGT-A cycles resulted in one or more AFO-derived blastocysts (n = 26/719; 3.6%). Overall, eight additional balanced-diploid transferable embryos were obtained from AFOs. In three cycles, the only balanced-diploid blastocyst produced was from an AFO (n = 3/719; 0.4%). Three AFO-derived live births were achieved: one from a 1PN zygote and two from 2.1PN zygotes. CONCLUSION(S) Enhanced PGT-A technologies incorporating reliable ploidy assessment provide an effective tool to rescue AFO-derived blastocysts for clinical use.
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Affiliation(s)
- Antonio Capalbo
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy; Genetyx, Molecular Genetics Laboratory, Marostica, Italy.
| | - Nathan Treff
- Reproductive Medicine Associates of New Jersey, Basking Ridge, New Jersey
| | - Danilo Cimadomo
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy; Dipartimento di Scienze Anatomiche, Istologiche, Medico Legali e dell'Apparato Locomotore, Università degli Studi di Roma "Sapienza," Rome, Italy
| | - Xin Tao
- Reproductive Medicine Associates of New Jersey, Basking Ridge, New Jersey
| | - Susanna Ferrero
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy
| | - Alberto Vaiarelli
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy
| | - Silvia Colamaria
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy
| | - Roberta Maggiulli
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy
| | - Giovanna Orlando
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy
| | - Catello Scarica
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy
| | - Richard Scott
- Reproductive Medicine Associates of New Jersey, Basking Ridge, New Jersey
| | - Filippo Maria Ubaldi
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy; Genetyx, Molecular Genetics Laboratory, Marostica, Italy
| | - Laura Rienzi
- Genera, Centers for Reproductive Medicine, Clinica Valle Giulia, Rome, Italy; Genetyx, Molecular Genetics Laboratory, Marostica, Italy
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23
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Mateo S, Vidal F, Coll L, Veiga A, Boada M. Chromosomal analysis of blastocyst derived from monopronucleated ICSI zygotes: approach by double trophectoderm biopsy. JBRA Assist Reprod 2017; 21:203-207. [PMID: 28837028 PMCID: PMC5574641 DOI: 10.5935/1518-0557.20170039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Objective This study aims to increase the knowledge about monopronucleated ICSI-derived
blastocysts, analyzing trophectoderm biopsies by aCGH and FISH to evaluate
their chromosome constitution. Methods Fifteen monopronucleated ICSI-derived blastocysts were studied. Double
trophectoderm biopsy was performed and analyzed by FISH and aCGH. The
blastocysts were classified according to chromosome constitution.
Disagreements between the two techniques were assessed. Results Results obtained after FISH and aCGH analyses showed the following: 20%
(3/15) and 60% (9/15) diploid females, respectively; 26.7% (4/15) and 26.7%
(4/15) diploid males, respectively; and 53.3% (8/15) and 13.3% (2/15)
mosaics, respectively. No mosaic male embryos were found using FISH or aCGH.
There were disagreements in 40% (6/15) of the cases due to the higher
detection of mosaicism by FISH compared to aCGH. Conclusions The combination of FISH and aCGH has been shown to be a suitable approach to
increase the knowledge about monopronucleated ICSI-derived embryos. FISH
analysis of blastocysts derived from monopronucleated ICSI zygotes enabled
us to conclude that aCGH underestimates haploidy. Some diploid embryos
diagnosed by aCGH are in fact mosaic. In cases where these embryos would be
used for reproductive purposes, extra analysis of parental genome origin is
recommended.
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Affiliation(s)
- Silvia Mateo
- Reproductive Medicine Service, Department of Obstetrics, Gynaecology and Reproduction, Women's Health Dexeus, Barcelona, Spain
| | - Francesca Vidal
- Cell Biology Unit, Faculty of Biosciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Lluc Coll
- Reproductive Medicine Service, Department of Obstetrics, Gynaecology and Reproduction, Women's Health Dexeus, Barcelona, Spain
| | - Anna Veiga
- Reproductive Medicine Service, Department of Obstetrics, Gynaecology and Reproduction, Women's Health Dexeus, Barcelona, Spain.,Stem Cell Bank, Centre for Regenerative Medicine, Barcelona, Spain
| | - Montserrat Boada
- Reproductive Medicine Service, Department of Obstetrics, Gynaecology and Reproduction, Women's Health Dexeus, Barcelona, Spain
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